WO1998044524A1 - Switching device - Google Patents
Switching device Download PDFInfo
- Publication number
- WO1998044524A1 WO1998044524A1 PCT/EP1998/001386 EP9801386W WO9844524A1 WO 1998044524 A1 WO1998044524 A1 WO 1998044524A1 EP 9801386 W EP9801386 W EP 9801386W WO 9844524 A1 WO9844524 A1 WO 9844524A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact arm
- brake body
- contact
- switching device
- impact
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
Definitions
- the invention relates to a switching device with a contact arrangement with at least one movable contact piece arranged on a rotatable or displaceable contact arm and at least one fixed contact piece, the switching device comprising at least a first stop which limits the movement of the contact arm when the contact arrangement is opened.
- a circuit breaker with a contact arrangement which comprises a movable contact piece arranged on a rotatable contact arm and a fixed contact piece, a stop being provided which limits the movement of the contact arm when the movable contact piece opens.
- the contact arm When the contact arm has reached its end position, the arm is prevented from falling back into the closed position of the contact arrangement by a corresponding mechanical safety device.
- a disadvantage of such a switching device is, inter alia, that when the contact arrangement is opened - especially with high switching capacities - there is a risk that the contact arm will be thrown back by the stop before the mechanical safety device acts, so that the contact arrangement is inadvertently closed again.
- the invention is therefore based on the object of specifying a switching device of the type mentioned at the outset, in which the contact arm is braked even in the case of high switching powers when it reaches its predetermined end position, without it then being thrown back by the stop.
- the first stop is a brake body which is arranged as a whole and that the material and the inertia of the contact arm including the movable contact piece on the one hand and the brake body on the other hand are chosen such that when the contact arm strikes the brake body is impacted in such a way that the contact arm is braked and the brake body is moved.
- the invention is essentially based on the idea of using a movable brake body as a stop, the material and inertia (ie inertial mass or moment of inertia) of which is matched to the contact arm in such a way that a shock is performed when the contact arm hits the brake body, such that the contact arm is braked sharply and the brake body is moved at a corresponding speed in a predetermined direction.
- inertia ie inertial mass or moment of inertia
- the brake body can then be braked after appropriate travel by a corresponding additional means, for example a second stop or a spring.
- a damping body is provided between the brake body and the second stop the impact of the switching arm against the brake body slows down its movement, provided that the brake body is in turn moved back to an initial position.
- This damping body can preferably simultaneously serve as a holding element for the brake body. So that the contact arm is not pushed and pivoted back by the moving back brake body, it has proven to be advantageous to provide a back stop for the brake body.
- an elastically or plastically deformable material for example lead
- a large part of the kinetic energy of the contact arm can be permanently absorbed when the contact piece strikes the brake body.
- the permanent deformation of the brake body can also be used in a simple manner (for example by using a viewing window or by using a pressure sensor etc.) to display the service life of the switching device.
- the brake body is advantageously supported by a guide such that it is moved in the direction of impact after the impact with the contact arm. It is also advantageous if the inertia of the contact arm and brake body relevant for the impact are approximately the same.
- the switching device is a pole of a circuit breaker with two fixed contact pieces and two movable contact pieces per pole to be switched, the movable contact pieces being attached to the two opposite ends of the contact arm and each end of the Contact arm is assigned a brake body.
- the contact arm can be pivoted about a central axis or if the contact arm can be moved linearly.
- Figure 1 the side view of the contact arrangement of a switching device according to the invention with two rotatable switching elements arranged on a contact arm and two brake bodies opposite the ends of the contact arm, the contact arrangement being in its closed position;
- FIG. 2 the section designated II in FIG. 1, the brake body being mounted in a damping body;
- FIG. 3 a switching device according to the invention with a rear stop to limit the bouncing movement of the brake body;
- FIG. 4 the side view of a further exemplary embodiment of the invention, in which the brake body is displaceably arranged at an angle of approximately 45 ° to the movement of the contact arm;
- Figure 5 the section through an embodiment of the invention, in which the brake body consists of a plastically deformable material.
- FIG. 1 denotes a circuit breaker, which comprises a switching chamber housing with a housing wall 2, which is only indicated schematically, and a contact arrangement 3 arranged in the housing.
- a circuit breaker which comprises a switching chamber housing with a housing wall 2, which is only indicated schematically, and a contact arrangement 3 arranged in the housing.
- two connecting terminals 4, 5 are provided, which are connected via loop-shaped NEN-shaped conductors 6, 7 are connected to two fixed contact pieces 8, 9.
- the fixed contact pieces 8, 9 are bridged by means of a contact arm 11 which can be rotated about an axis 10.
- the two arm halves 12, 13 of the rotatable contact arm 11 press against movable contact pieces 14, 15 against the fixed contact pieces 8, 9.
- each one Brake body (first stop) 16, 17 arranged between the housing wall 2 and the two sides of the contact arm 11, which are opposite the movable contact pieces 14, 15, are each one Brake body (first stop) 16, 17 arranged.
- the brake bodies are made, for example, of the same material as the contact arm (for example, copper).
- the masses of the two brake bodies 16, 17 are so matched to the mass of the contact arm 11, including the movable switching elements 14, 15, that an opening movement in the direction indicated by the arrows 100 when the contact arm 11 strikes the respective brake body 16, 17 elastic impact is carried out in such a way that the contact arm 11 brakes strongly (ideally completely braked) and the respective brake body 16, 17 is moved towards the housing wall 2 at a corresponding speed.
- the housing wall 2 is formed in the impact area of the respective brake body 16, 17 as a second stop 18, 19 for braking the brake body.
- the respective brake body 16, 17 is preferably mounted in a damping body 20 made of a resilient material (preferably rubber) which, after the contact arm 11 strikes the brake body 16, 17, partially brakes its movement.
- FIG. 3 shows a corresponding embodiment of a back stop designated by 21.
- the back stop is formed by the inner step of a step recess in a corresponding support part 22.
- the contact arm can be braked by means of a movable brake body not only when using rotatable but also when using movable contact arms. Further can also be used as a damping body with a spring with appropriate characteristics.
- the respective brake body does not have to be arranged in the region of the contact arm ends as shown in the figures, but can be arranged in particular with a view to realizing a straight central impact of the impacting and the impacted body such that the direction of impact with the connecting line the center of the contact arm (or contact arm half) and the brake body coincide.
- the brake body does not necessarily have to move in the direction of the opening movement of the contact arm, but can - if this e.g. should be necessary for reasons of space - also move in another direction.
- a corresponding exemplary embodiment is shown in FIG. 4.
- 1 1 ' denotes a contact arm which can be pivoted about an axis 10' and, during its opening movement, strikes against a brake body 16 'supported by a guide 23 such that it is displaced obliquely outwards along the guide 23.
- the material of the brake body need not necessarily be only an elastically deformable material. Rather, the brake body can also be at least partially plastically deformable. In this case, lead can be used as the material. As a result, a large part of the kinetic energy of the contact arm is permanently absorbed when the contact piece strikes the brake body. In such an embodiment, the permanent deformation of the brake body can also be used in a simple manner to display the service life of the switching device.
- a corresponding exemplary embodiment of an arrangement with a brake body made of plastically deformable material is shown in FIG. 5.
- the contact arm which is only indicated schematically, is designated by 24 and the plastically deformable brake body by 25.
- a deformation space 26 is provided, into which the brake body can escape when the contact arm strikes (dashed line).
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Massaging Devices (AREA)
- Valve Device For Special Equipments (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Vehicle Body Suspensions (AREA)
- Eye Examination Apparatus (AREA)
- Seal Device For Vehicle (AREA)
- Mechanisms For Operating Contacts (AREA)
- Push-Button Switches (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU70334/98A AU7033498A (en) | 1997-03-27 | 1998-03-11 | Switching device |
US09/381,875 US6246021B1 (en) | 1997-03-27 | 1998-03-11 | Switching device |
AT98916914T ATE230155T1 (en) | 1997-03-27 | 1998-03-11 | SWITCHING DEVICE |
EP98916914A EP0970497B1 (en) | 1997-03-27 | 1998-03-11 | Switching device |
DE59806727T DE59806727D1 (en) | 1997-03-27 | 1998-03-11 | CONTROL DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712958.7 | 1997-03-27 | ||
DE19712958A DE19712958C1 (en) | 1997-03-27 | 1997-03-27 | Switch device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998044524A1 true WO1998044524A1 (en) | 1998-10-08 |
Family
ID=7824836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/001386 WO1998044524A1 (en) | 1997-03-27 | 1998-03-11 | Switching device |
Country Status (6)
Country | Link |
---|---|
US (1) | US6246021B1 (en) |
EP (1) | EP0970497B1 (en) |
AT (1) | ATE230155T1 (en) |
AU (1) | AU7033498A (en) |
DE (2) | DE19712958C1 (en) |
WO (1) | WO1998044524A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6489869B2 (en) * | 2000-03-08 | 2002-12-03 | Juergen Breitlow-Hertzfeldt | Electrical component and process for the manufacture thereof |
EP1132935B1 (en) * | 2000-03-08 | 2006-08-23 | Tyco Electronics AMP GmbH | Electrical component and process for the manufacture thereof |
US6590172B1 (en) * | 2002-03-29 | 2003-07-08 | General Electric Company | Circuit breaker mechanism for a rotary contact system |
US7064284B1 (en) * | 2005-01-13 | 2006-06-20 | Eaton Corporation | Circuit breaker with bumper |
DE102005014006B4 (en) * | 2005-03-26 | 2013-09-19 | Abb Ag | Electrical switching device |
DE102008024387A1 (en) * | 2008-05-15 | 2009-11-19 | Siemens Aktiengesellschaft | Switching device, has movable contact element contacting stationary contact element in contact position for closing electric circuit, and deceleration device reducing speed of movable contact element |
DE102010017900A1 (en) * | 2010-04-21 | 2011-10-27 | Abb Ag | Installation switching device with a double break |
CN102856086B (en) * | 2011-06-29 | 2015-04-29 | 西门子公司 | Switching device |
CN109411247A (en) * | 2017-08-18 | 2019-03-01 | 日立电梯(中国)有限公司 | A kind of switch resilience-proof device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1048980A (en) * | 1950-12-08 | 1953-12-28 | Westinghouse Electric Corp | Damper for circuit breaker |
DE1025041B (en) * | 1954-09-03 | 1958-02-27 | Siemens Ag | Electric toggle switch |
DE2037552A1 (en) * | 1970-07-29 | 1972-02-03 | Siemens Ag | Circuit breaker, especially residual current circuit breaker |
EP0353950A2 (en) * | 1988-08-01 | 1990-02-07 | Eaton Corporation | Rubber stops in outside poles |
DE4201956A1 (en) * | 1992-01-24 | 1993-07-29 | Siemens Ag | Contact arrangement for vacuum switches with coaxial contacts - has shock absorber between current lead to movable contact and coupling stage of driver |
DE29510909U1 (en) * | 1995-07-06 | 1995-09-14 | Kloeckner Moeller Gmbh | Current limiting contact system with delayed release of the electrodynamically actuated moving contact |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3443253A (en) * | 1966-12-05 | 1969-05-06 | Babcock Electronics Corp | Armature damping structure |
US4563557A (en) * | 1984-09-28 | 1986-01-07 | Westinghouse Electric Corp. | Molded case circuit breaker with a movable contact arm shock absorbing member |
US4650946A (en) * | 1985-11-27 | 1987-03-17 | Westinghouse Electric Corp. | Circuit breaker with stop plate for contact arm |
JPH067552Y2 (en) * | 1986-08-04 | 1994-02-23 | 三菱電機株式会社 | Multi-pole circuit breaker |
US5023583A (en) * | 1988-10-21 | 1991-06-11 | Westinghouse Electric Corp. | Circuit breaker contact operating structure |
US5089795A (en) * | 1990-06-29 | 1992-02-18 | General Electric Company | Compact molded case circuit breaker with movable contact arm rebound cushion |
US5192841A (en) * | 1991-11-06 | 1993-03-09 | Westinghouse Electric Corp. | Circuit breaker with shock absorbing mechanism |
-
1997
- 1997-03-27 DE DE19712958A patent/DE19712958C1/en not_active Expired - Fee Related
-
1998
- 1998-03-11 EP EP98916914A patent/EP0970497B1/en not_active Expired - Lifetime
- 1998-03-11 US US09/381,875 patent/US6246021B1/en not_active Expired - Fee Related
- 1998-03-11 DE DE59806727T patent/DE59806727D1/en not_active Expired - Fee Related
- 1998-03-11 AT AT98916914T patent/ATE230155T1/en not_active IP Right Cessation
- 1998-03-11 AU AU70334/98A patent/AU7033498A/en not_active Abandoned
- 1998-03-11 WO PCT/EP1998/001386 patent/WO1998044524A1/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1048980A (en) * | 1950-12-08 | 1953-12-28 | Westinghouse Electric Corp | Damper for circuit breaker |
DE1025041B (en) * | 1954-09-03 | 1958-02-27 | Siemens Ag | Electric toggle switch |
DE2037552A1 (en) * | 1970-07-29 | 1972-02-03 | Siemens Ag | Circuit breaker, especially residual current circuit breaker |
EP0353950A2 (en) * | 1988-08-01 | 1990-02-07 | Eaton Corporation | Rubber stops in outside poles |
DE4201956A1 (en) * | 1992-01-24 | 1993-07-29 | Siemens Ag | Contact arrangement for vacuum switches with coaxial contacts - has shock absorber between current lead to movable contact and coupling stage of driver |
DE29510909U1 (en) * | 1995-07-06 | 1995-09-14 | Kloeckner Moeller Gmbh | Current limiting contact system with delayed release of the electrodynamically actuated moving contact |
Also Published As
Publication number | Publication date |
---|---|
DE19712958C1 (en) | 1998-05-07 |
DE59806727D1 (en) | 2003-01-30 |
ATE230155T1 (en) | 2003-01-15 |
US6246021B1 (en) | 2001-06-12 |
AU7033498A (en) | 1998-10-22 |
EP0970497A1 (en) | 2000-01-12 |
EP0970497B1 (en) | 2002-12-18 |
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